When I add a pop-up menu to a button symbol I've created, all
is well until I click on "done." Then, when I click on the + sign
for that button, it says "Add Pop-up Menu..." as if I hadn't added
it already. When I click on "Add Pop-up Menu..." again, nothing's
there.

I'm using Fireworks CS4 for the Mac. I've used Fireworks MX
on my PC for many years, and have never had this problem.
Help!!

I found a bizarre work around for the pop-up menus that will
not seem to retain any changes made in the pop-up menu editor. As
soon as you finish making the changes in the editor and hit Done,
go to the library (either document library or common library) and
double click on the symbol to which the pop-up menu is attached.
Click the Edit button. Then finish the editing by hitting the left
arrow at the top left of the workspace. Now the changes to the
pop-up menu have been saved.